// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.android_webview;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteException;
import android.util.Log;
import org.chromium.android_webview.common.Lifetime;
/**
* This database is used to support WebView's setHttpAuthUsernamePassword and
* getHttpAuthUsernamePassword methods, and WebViewDatabase's clearHttpAuthUsernamePassword and
* hasHttpAuthUsernamePassword methods.
*
* While this class is intended to be used as a singleton, this property is not enforced in this
* layer, primarily for ease of testing. To line up with the classic implementation and behavior,
* there is no specific handling and reporting when SQL errors occur.
*
* Note on thread-safety: As per the classic implementation, most API functions have thread safety
* provided by the underlying SQLiteDatabase instance. The exception is database opening: this
* is handled in the dedicated background thread, which also provides a performance gain
* if triggered early on (e.g. as a side effect of CookieSyncManager.createInstance() call),
* sufficiently in advance of the first blocking usage of the API.
*/
@Lifetime.Profile
public class HttpAuthDatabase {
private static final String LOGTAG = "HttpAuthDatabase";
private static final int DATABASE_VERSION = 1;
private SQLiteDatabase mDatabase;
private static final String ID_COL = "_id";
private static final String[] ID_PROJECTION = new String[] {ID_COL};
// column id strings for "httpauth" table
private static final String HTTPAUTH_TABLE_NAME = "httpauth";
private static final String HTTPAUTH_HOST_COL = "host";
private static final String HTTPAUTH_REALM_COL = "realm";
private static final String HTTPAUTH_USERNAME_COL = "username";
private static final String HTTPAUTH_PASSWORD_COL = "password";
/** Initially false until the background thread completes. */
private boolean mInitialized;
private final Object mInitializedLock = new Object();
/**
* Creates and returns an instance of HttpAuthDatabase for the named file, and kicks-off
* background initialization of that database.
*
* @param context the Context to use for opening the database
* @param databaseFile Name of the file to be initialized.
*/
public static HttpAuthDatabase newInstance(final Context context, final String databaseFile) {
final HttpAuthDatabase httpAuthDatabase = new HttpAuthDatabase();
new Thread() {
@Override
public void run() {
httpAuthDatabase.initOnBackgroundThread(context, databaseFile);
}
}.start();
return httpAuthDatabase;
}
// Prevent instantiation. Callers should use newInstance().
private HttpAuthDatabase() {}
/**
* Initializes the databases and notifies any callers waiting on waitForInit.
*
* @param context the Context to use for opening the database
* @param databaseFile Name of the file to be initialized.
*/
private void initOnBackgroundThread(Context context, String databaseFile) {
synchronized (mInitializedLock) {
if (mInitialized) {
return;
}
initDatabase(context, databaseFile);
// Thread done, notify.
mInitialized = true;
mInitializedLock.notifyAll();
}
}
/**
* Opens the database, and upgrades it if necessary.
*
* @param context the Context to use for opening the database
* @param databaseFile Name of the file to be initialized.
*/
private void initDatabase(Context context, String databaseFile) {
try {
mDatabase = context.openOrCreateDatabase(databaseFile, 0, null);
} catch (SQLiteException e) {
// try again by deleting the old db and create a new one
if (context.deleteDatabase(databaseFile)) {
try {
mDatabase = context.openOrCreateDatabase(databaseFile, 0, null);
} catch (SQLiteException ex) {
Log.e(LOGTAG, "Caught exception while trying init again", ex);
}
}
}
if (mDatabase == null) {
// Not much we can do to recover at this point
Log.e(LOGTAG, "Unable to open or create " + databaseFile);
return;
}
if (mDatabase.getVersion() != DATABASE_VERSION) {
mDatabase.beginTransactionNonExclusive();
try {
createTable();
mDatabase.setTransactionSuccessful();
} finally {
mDatabase.endTransaction();
}
}
}
private void createTable() {
mDatabase.execSQL(
"CREATE TABLE "
+ HTTPAUTH_TABLE_NAME
+ " ("
+ ID_COL
+ " INTEGER PRIMARY KEY, "
+ HTTPAUTH_HOST_COL
+ " TEXT, "
+ HTTPAUTH_REALM_COL
+ " TEXT, "
+ HTTPAUTH_USERNAME_COL
+ " TEXT, "
+ HTTPAUTH_PASSWORD_COL
+ " TEXT,"
+ " UNIQUE ("
+ HTTPAUTH_HOST_COL
+ ", "
+ HTTPAUTH_REALM_COL
+ ") ON CONFLICT REPLACE);");
mDatabase.setVersion(DATABASE_VERSION);
}
/**
* Waits for the background initialization thread to complete and check the database creation
* status.
*
* @return true if the database was initialized, false otherwise
*/
private boolean waitForInit() {
synchronized (mInitializedLock) {
while (!mInitialized) {
try {
mInitializedLock.wait();
} catch (InterruptedException e) {
Log.e(LOGTAG, "Caught exception while checking initialization", e);
}
}
}
return mDatabase != null;
}
/**
* Sets the HTTP authentication password. Tuple (HTTPAUTH_HOST_COL, HTTPAUTH_REALM_COL,
* HTTPAUTH_USERNAME_COL) is unique.
*
* @param host the host for the password
* @param realm the realm for the password
* @param username the username for the password.
* @param password the password
*/
public void setHttpAuthUsernamePassword(
String host, String realm, String username, String password) {
if (host == null || realm == null || !waitForInit()) {
return;
}
final ContentValues c = new ContentValues();
c.put(HTTPAUTH_HOST_COL, host);
c.put(HTTPAUTH_REALM_COL, realm);
c.put(HTTPAUTH_USERNAME_COL, username);
c.put(HTTPAUTH_PASSWORD_COL, password);
mDatabase.insert(HTTPAUTH_TABLE_NAME, HTTPAUTH_HOST_COL, c);
}
/**
* Retrieves the HTTP authentication username and password for a given host and realm pair. If
* there are multiple username/password combinations for a host/realm, only the first one will
* be returned.
*
* @param host the host the password applies to
* @param realm the realm the password applies to
* @return a String[] if found where String[0] is username (which can be null) and
* String[1] is password. Null is returned if it can't find anything.
*/
public String[] getHttpAuthUsernamePassword(String host, String realm) {
if (host == null || realm == null || !waitForInit()) {
return null;
}
final String[] columns = new String[] {HTTPAUTH_USERNAME_COL, HTTPAUTH_PASSWORD_COL};
final String selection =
"(" + HTTPAUTH_HOST_COL + " == ?) AND " + "(" + HTTPAUTH_REALM_COL + " == ?)";
String[] ret = null;
Cursor cursor = null;
try {
cursor =
mDatabase.query(
HTTPAUTH_TABLE_NAME,
columns,
selection,
new String[] {host, realm},
null,
null,
null);
if (cursor.moveToFirst()) {
ret =
new String[] {
cursor.getString(cursor.getColumnIndexOrThrow(HTTPAUTH_USERNAME_COL)),
cursor.getString(cursor.getColumnIndexOrThrow(HTTPAUTH_PASSWORD_COL)),
};
}
} catch (IllegalStateException e) {
Log.e(LOGTAG, "getHttpAuthUsernamePassword", e);
} finally {
if (cursor != null) cursor.close();
}
return ret;
}
/**
* Determines if there are any HTTP authentication passwords saved.
*
* @return true if there are passwords saved
*/
public boolean hasHttpAuthUsernamePassword() {
if (!waitForInit()) {
return false;
}
Cursor cursor = null;
boolean ret = false;
try {
cursor =
mDatabase.query(
HTTPAUTH_TABLE_NAME, ID_PROJECTION, null, null, null, null, null);
ret = cursor.moveToFirst();
} catch (IllegalStateException e) {
Log.e(LOGTAG, "hasEntries", e);
} finally {
if (cursor != null) cursor.close();
}
return ret;
}
/** Clears the HTTP authentication password database. */
public void clearHttpAuthUsernamePassword() {
if (!waitForInit()) {
return;
}
mDatabase.delete(HTTPAUTH_TABLE_NAME, null, null);
}
}
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